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mineral toxicology

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https://www.readbyqxmd.com/read/28431380/recent-aspects-of-uranium-toxicology-in-medical-geology
#1
REVIEW
Geir Bjørklund, Olav Albert Christophersen, Salvatore Chirumbolo, Olle Selinus, Jan Aaseth
Uranium (U) is a chemo-toxic, radiotoxic and even a carcinogenic element. Due to its radioactivity, the effects of U on humans health have been extensively investigated. Prolonged U exposure may cause kidney disease and cancer. The geological distribution of U radionuclides is still a great concern for human health. Uranium in groundwater, frequently used as drinking water, and general environmental pollution with U raise concerns about the potential public health problem in several areas of Asia. The particular paleo-geological hallmark of India and other Southern Asiatic regions enhances the risk of U pollution in rural and urban communities...
April 18, 2017: Environmental Research
https://www.readbyqxmd.com/read/28319860/effects-of-silver-nanoparticles-on-survival-biomass-change-and-avoidance-behaviour-of-the-endogeic-earthworm-allolobophora-chlorotica
#2
C Brami, A R Glover, K R Butt, C N Lowe
Increasing commercial application of silver nanoparticles (Ag NP) and subsequent presence in wastewater and sewage sludge has raised concerns regarding their effects in the aquatic and terrestrial environment. Several studies have employed standardised acute and chronic earthworm-based tests to establish the toxicological effects of Ag NP within soil. These studies have relied heavily on the use of epigiec earthworm species which may have limited ecological relevance in mineral soil. This study assessed the influence of Ag NP (uncoated 80nm powder) and AgNO3 on survival, change in biomass and avoidance behaviour in a soil dwelling (endogiec) species, Allolobophora chlorotica...
March 15, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28222304/fabrication-of-novel-visible-light-driven-agi-g-c3n4-composites-with-enhanced-visible-light-photocatalytic-activity-for-diclofenac-degradation
#3
Wei Zhang, Li Zhou, Jun Shi, Huiping Deng
A visible-light-driven heterostructured AgI/g-C3N4 was prepared by a deposition-precipitation method. The composition, structure, morphology, and optical properties of the photocatalyst were characterized by Brunauer-Emmett-Teller method (BET), X-ray powder diffraction (XRD), Fourier transform-infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), scanning electron microscope (SEM), UV-vis diffused reflectance spectroscopy (DRS), photoluminescence spectroscopy (PL), photocurrent, and electrochemical impedance spectroscopy (EIS), respectively...
February 14, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28120304/evaluation-of-long-term-toxicity-of-oral-zinc-oxide-nanoparticles-and-zinc-sulfate-in-mice
#4
Chao Wang, Kang Cheng, Le Zhou, Jintian He, Xiaochuan Zheng, Lili Zhang, Xiang Zhong, Tian Wang
The toxicological effects of zinc oxide nanoparticles (nano-ZnOs) are related to their dissolution and interference with zinc ion homeostasis. High-soluble zinc sources may produce more severe and acute toxicity; however, the evaluation of potential toxicity of long-term exposure to nano-ZnOs and high-soluble sources of zinc remains obscure. This study aimed at evaluating effects of nano-ZnOs and zinc sulfate on development, serum and hematological parameters, and mineral concentrations in selected tissues and intestinal microbiota in mice via gastrointestinal administration for 7 weeks...
January 24, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28104475/effects-of-cry1ab-bt-maize-straw-return-on-bacterial-community-of-earthworm-eisenia-fetida
#5
Yinghua Shu, Yanyan Zhang, Huilan Zeng, Yahui Zhang, Jianwu Wang
The eco-toxicological effects of Bacillus thuringiensis (Bt) maize on earthworm life-history traits were widely studied and the results were controversial, while their effects on earthworm bacterial community have been rarely studied. Here, effects of two hybrids of Bt maize [5422Bt1 (event Bt11) and 5422CBCL (MON810)] straw return on Eisenia fetida bacterial community were investigated by the terminal restriction fragment length polymorphism (T-RFLP) and polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) combing with DNA sequencing, compared to near-isogenic non-Bt maize (5422)...
April 2017: Chemosphere
https://www.readbyqxmd.com/read/28056959/morphological-densitometric-and-mechanical-properties-of-mandible-in-5-month-old-polish-merino-sheep
#6
Anna Szabelska, Marcin R Tatara, Witold Krupski
BACKGROUND: Among bones building the axial and appendicular skeleton, the mandible is characterized by unique morphological and functional traits. The aim of the study was to evaluate morphological, densitometric and mechanical properties of mandible in 5-month-old Polish Merino sheep. Using quantitative computed tomography, volumetric bone mineral density (vBMD) and calcium hydroxyapatite density of the cortical bone (CbCa-HA), mean vBMD (MvBMD) and total bone volume were determined...
January 5, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/27956261/advances-in-drug-metabolism-and-pharmacogenetics-research-in-australia
#7
Peter I Mackenzie, Andrew A Somogyi, John O Miners
Metabolism facilitates the elimination, detoxification and excretion in urine or bile (as biotransformation products) of a myriad of structurally diverse drugs and other chemicals. The metabolism of drugs, non-drug xenobiotics and many endogenous compounds is catalyzed by families of drug metabolizing enzymes (DMEs). These include the hemoprotein-containing cytochromes P450, which function predominantly as monooxygenases, and conjugation enzymes that transfer a sugar, sulfate, acetate or glutathione moiety to substrates containing a suitable acceptor functional group...
February 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/27901621/perfluorooctanoic-acid-induces-mitochondrial-dysfunction-in-mc3t3-e1-osteoblast-cells
#8
Eun Mi Choi, Kwang Sik Suh, Sang Youl Rhee, Seungjoon Oh, Jeong-Taek Woo, Sung Woon Kim, Young Seol Kim, Youngmi Kim Pak, Suk Chon
Perfluorooctanoic acid (PFOA), a stable organic perfluorinated compound, is an emerging persistent organic pollutant, found widely in human and wildlife populations. Recent evidence suggests that exposure to environmental toxicants can be associated with higher risks of osteoporosis and fractures. We studied the cellular toxicology of PFOA in MC3T3-E1osteoblast cells. To examine the effect of PFOA, we measured cell viability, reactive oxygen species (ROS), mitochondrial superoxide, and mitochondrial parameters including adenosine triphosphate (ATP) level, mitochondrial membrane potential (MMP), cardiolipin content, and cytochrome c release in MC3T3-E1 cells...
February 23, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27664520/degradation-of-ciprofloxacin-by-280%C3%A2-nm-ultraviolet-activated-persulfate-degradation-pathway-and-intermediate-impact-on-proteome-of-escherichia-coli
#9
Jin-Shao Ye, Juan Liu, Hua-Se Ou, Lin-Lin Wang
In this study, the degradation of ciprofloxacin (CIP) was explored using ultraviolet activated persulfate (UV/PS) with 280 nm ultraviolet light-emitting diodes (UV-LEDs), and the toxicological assessment of degrading intermediates was performed using iTRAQ labeling quantitative proteomic technology. The quantitative mass spectrum results showed that 280 nm UV/PS treatment had a high transformation efficiency of CIP ([CIP] = 3 μM, [S2O8(2-)] = 210 μM, apparent rate constants 0.2413 min(-1)). The high resolution mass spectrum analyses demonstrated that the primary intermediates included C15H16FN3O3 (m/z 306...
December 2016: Chemosphere
https://www.readbyqxmd.com/read/27642040/herbal-extracts-lichens-and-biomolecules-as-natural-photo-protection-alternatives-to-synthetic-uv-filters-a-systematic-review
#10
REVIEW
Matteo Radice, Stefano Manfredini, Paola Ziosi, Valeria Dissette, Piergiacomo Buso, Arianna Fallacara, Silvia Vertuani
Besides the unquestionable positive effects of solar exposure for human health, UV rays have been widely investigated for toxicology aspects related to excessive UVB and UVA doses, which involve sunburns, skin aging, DNA skin damage and tumorigenesis. At present, synthetic and mineral sunscreens are used to protect against these damages but several natural molecules can provide UV protection, including also synergic effect or enhanced photo stability. Although a large number of herbal extracts and plant origin molecules can deserve potential applications, most of the study reported utilizes different method and different strategies of investigation, making thus difficult to understand the real versus claimed potential...
October 2016: Fitoterapia
https://www.readbyqxmd.com/read/27632980/antimicrobial-potential-of-two-traditional-herbometallic-drugs-against-certain-pathogenic-microbial-species
#11
A U Wijenayake, C L Abayasekara, H M T G A Pitawala, B M R Bandara
BACKGROUND: Mineral based preparations are widely used for centuries as antimicrobial agents. However, the efficacy and the mode of action of mineral based preparations are uncertain due to the insufficient antimicrobial studies. Arogyawardhana Vati (AV) and Manikya Rasa (MR) are such two Rasashastra herbo-minerallic drugs commonly in India and other countries in South Asia. Despite of their well known traditional use of skin diseases, reported antimicrobial and mineralogical studies are limited...
September 15, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27580261/nanominerals-fullerene-aggregates-and-hazardous-elements-in-coal-and-coal-combustion-generated-aerosols-an-environmental-and-toxicological-assessment
#12
Jyotilima Saikia, Bardwi Narzary, Sonali Roy, Manobjyoti Bordoloi, Prasenjit Saikia, Binoy K Saikia
Studies on coal-derived nanoparticles as well as nano-minerals are important in the context of the human health and the environment. The coal combustion-generated aerosols also affect human health and environmental quality aspects in any coal-fired station. In this study, the feed coals and their combustion-generated aerosols from coal-fired boilers of two tea industry facilities were investigated for the presence of nanoparticles/nano minerals, fullerene aggregates, and potentially hazardous elements (PHEs)...
December 2016: Chemosphere
https://www.readbyqxmd.com/read/27555376/toxic-effects-of-copper-sulfate-and-copper-nanoparticles-on-minerals-enzymes-thyroid-hormones-and-protein-fractions-of-plasma-and-histopathology-in-common-carp-cyprinus-carpio
#13
Seyyed Morteza Hoseini, Aliakbar Hedayati, Ali Taheri Mirghaed, Melika Ghelichpour
Differences in toxicological effects of dissolved copper and copper nanoparticles were studied in common carp, Cyprinus carpio. The fish were exposed to 0.25mgL(-1) copper as copper sulfate (0.25Cu), 0.25mgL(-1) copper as copper oxide nanoparticles (0.25NCu) and 25mgL(-1) copper as copper oxide nanoparticles (25NCu) over 14days. Plasma biochemical, enzymatic and hormonal characteristics, and liver and kidney histopathology were examined at the end of the experiment. The results showed that both forms of copper had no significant effects on plasma calcium levels, however, significantly increased plasma phosphorous levels, compared to control group (no added copper)...
October 2016: Experimental and Toxicologic Pathology: Official Journal of the Gesellschaft Für Toxikologische Pathologie
https://www.readbyqxmd.com/read/27544527/trace-element-contamination-differentiates-the-natural-population-of-scots-pine-evidence-from-dna-microsatellites-and-needle-morphology
#14
Ewa Chudzińska, Konrad Celiński, Ewa M Pawlaczyk, Aleksandra Wojnicka-Półtorak, Jean B Diatta
The Scots pine is often used in the biomonitoring of forests. Studies on the chemical composition plus variability of its needles morphological structure allow for an assessment of the state of environmental pollution. However, in their natural populations, the response of individual trees to stress differs. This study reports on the influence of long-term soil contamination with trace elements on the morphology of the needles, its possible relation to the differentiation of the genetic pool, and their implications for biomonitoring...
November 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27521950/removal-of-carbofuran-is-not-affected-by-co-application-of-chlorpyrifos-in-a-coconut-fiber-compost-based-biomixture-after-aging-or-pre-exposure
#15
Juan Salvador Chin-Pampillo, Mario Masís-Mora, Karla Ruiz-Hidalgo, Elizabeth Carazo-Rojas, Carlos E Rodríguez-Rodríguez
Biomixtures constitute the biologically active part of biopurification systems (BPS), which are used to treat pesticide-containing wastewater. The aim of this work was to determine whether co-application of chlorpyrifos (CLP) affects the removal of carbofuran (CFN) (both insecticide/nematicides) in a coconut fiber-compost-soil biomixture (FCS biomixture), after aging or previous exposure to CFN. Removal of CFN and two of its transformation products (3-hydroxycarbofuran and 3-ketocarbofuran) was enhanced in pre-exposed biomixtures in comparison to aged biomixtures...
August 2016: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/27468034/vitamin-b6-pyridoxine-hydrochloride-toxicosis-in-falcons
#16
Jaime Samour, Janine Perlman, Jörg Kinne, Vijay Baskar, Ulrich Wernery, Gerry Dorrestein
This manuscript reports three independent accidental cases of vitamin (Vit) B6 toxicosis in gyrfalcons (Falco rusticolus) and peregrine falcons (Falco peregrinus) and a toxicology study that was conducted to characterize the clinical responses of gyrfalcons and gyrfalcon × peregrine falcons to a range of single intramuscular (IM) and oral (PO) doses of Vit B6. Both lethal and nonlethal doses were determined. Twelve female gyrfalcons died following IM injection of 1 ml of a vitamin B preparation. Within 30 min of injection, the birds passed pistachio green-colored urates and progressed to vomiting, anorexia, cessation of normal activity, ptosis, collapse, and death, occurring 24-36 hr post injections...
June 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/27453164/consensus-report-of-the-2015-weinman-international-conference-on-mesothelioma
#17
Michele Carbone, Shreya Kanodia, Ann Chao, Aubrey Miller, Anil Wali, David Weissman, Alex Adjei, Francine Baumann, Paolo Boffetta, Brenda Buck, Marc de Perrot, A Umran Dogan, Steve Gavett, Alessandro Gualtieri, Raffit Hassan, Mary Hesdorffer, Fred R Hirsch, David Larson, Weimin Mao, Scott Masten, Harvey I Pass, Julian Peto, Enrico Pira, Ian Steele, Anne Tsao, Gavitt Alida Woodard, Haining Yang, Shakun Malik
On November 9 and 10, 2015, the International Conference on Mesothelioma in Populations Exposed to Naturally Occurring Asbestiform Fibers was held at the University of Hawaii Cancer Center in Honolulu, Hawaii. The meeting was cosponsored by the International Association for the Study of Lung Cancer, and the agenda was designed with significant input from staff at the U.S. National Cancer Institute and National Institute of Environmental Health Sciences. A multidisciplinary group of participants presented updates reflecting a range of disciplinary perspectives, including mineralogy, geology, epidemiology, toxicology, biochemistry, molecular biology, genetics, public health, and clinical oncology...
August 2016: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/27432232/acute-biomarker-panel-changes-associated-with-amphotericin-b-nephrotoxicity-in-female-sprague-dawley-rats
#18
LETTER
James Eric McDuffie, Steven Lee, Jing Ying Ma, Yafei Chen, Sandra Snook
To date, eight next‑generation urinary protein kidney safety biomarkers have been qualified to enable monitoring for subclinical drug‑induced kidney injury (DIKI) in rat preclinical studies; however, most DIKI biomarker studies have included only male rats. The objective of this study was to assess the utility of novel DIKI biomarkers, including but not limited to urinary total protein, albumin, cystatin C and osteopontin in female Sprague‑Dawley rats (8/group) that received repeated intravenous injections of amphotericin B (AmpB, 3 mg/kg/day) or vehicle for 10 consecutive days...
2016: Journal of Toxicological Sciences
https://www.readbyqxmd.com/read/27397058/anthophyllite-asbestos-state-of-the-science-review
#19
Shannon H Gaffney, Matthew Grespin, Lindsey Garnick, Derek A Drechsel, Rebecca Hazan, Dennis J Paustenbach, Brooke D Simmons
Anthophyllite is an amphibole form of asbestos historically used in only a limited number of products. No published resource currently exists that offers a complete overview of anthophyllite toxicity or of its effects on exposed human populations. We performed a review focusing on how anthophyllite toxicity was understood over time by conducting a comprehensive search of publicly available documents that discussed the use, mining, properties, toxicity, exposure and potential health effects of anthophyllite...
July 11, 2016: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/27393578/alterations-in-geometry-biomechanics-and-mineral-composition-of-juvenile-rat-femur-induced-by-nonplanar-pcb-155-and-or-planar-pcb-169
#20
Jana Brankovič, Sašo Jovanovski, Peter Jevnikar, Alexander Hofmeister, Birgit Reininger-Gutmann, Janja Jan, Maja Grošelj, Joško Osredkar, Matjaž Uršič, Gregor Fazarinc, Azra Pogačnik, Milka Vrecl
Exposure to widespread lipophilic and bioaccumulative polychlorinated biphenyls (PCBs) induces diverse biochemical and toxicological responses in various organs, including the bone. The aim of this study was to evaluate the changes in growth rate, geometry, serum, and bone biochemical parameters and biomechanics of juvenile rat femur induced by lactational exposure to nonplanar PCB-155 and planar PCB-169 individually and in combination. Fifteen lactating Wistar rats were divided into four groups (PCB-169, PCB-155, PCB-155+169, and control), and PCBs were administered intraperitoneally at different time points after delivery...
April 2017: Environmental Toxicology
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